78052187 has 2 divisors, whose sum is σ = 78052188. Its totient is φ = 78052186.

The previous prime is 78052159. The next prime is 78052207. The reversal of 78052187 is 78125087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78052187 - 2⁸ = 78051931 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78052187.

It is not a weakly prime, because it can be changed into another prime (78052127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39026093 + 39026094.

It is an arithmetic number, because the mean of its divisors is an integer number (39026094).

Almost surely, 2^78052187 is an apocalyptic number.

78052187 is a deficient number, since it is larger than the sum of its proper divisors (1).

78052187 is an equidigital number, since it uses as much as digits as its factorization.

78052187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 78052187 is about 8834.7148793835. The cubic root of 78052187 is about 427.3611363443.

Subtracting 78052187 from its reverse (78125087), we obtain a square (72900 = 270²).

The spelling of 78052187 in words is "seventy-eight million, fifty-two thousand, one hundred eighty-seven".